How do you know when your done having kids?

I have a 3 year old and when he was born I thought he is it, I didn’t want anymore I didn’t think I could love anyone else as much as him! My husband really wanted a second he didn’t want our son to be an only child so we had a second. After he was born I was so in love again! But it was a different feeling, It was a feeling of I could do this again, it’s like my heart just really exploded. I thought maybe it was the hormones but 6 months in with our second and I still really want another! I don’t feel done. Are you suppose to feel done? Is it still hormones?

My husband is not really on board for a third, he doesn’t want to be out numbered lol. It’s just a feeling like there’s another missing. It’s not even about gender like I need to try for a girl, I would honestly prefer another boy since we have all boy things.